Sawdust-elevator



(No Model.) 2 Sheets-Sheet 1. W. FREY.

SAWDUST ELEVATOR. No. 411,332. Patented Sept, 17, 1889.

UNITED STATES PATENT OFFICE.

IVILLIAM FREY, OF NEIV CUMBERLAND, OHIO.

SAWDUST-ELEVATO R.

SPECIFICATION forming part of Letters Patent No. 411,332, datedSeptember 17, 1889.

Application filed March 16, 1889. Serial No. 303,578. (No model.)

To all whom it may concern:

.Be it known that'I, IVILLIAM FREY, a citizen of the United States, anda resident of New Cumberland, in the county of Tuscarawas and State ofOhio, have invented certain new and useful Improvements in Sawdust-Elevators; and I do hereby declare that the following is a full, clear,and exact description of the invention, which will enable others skilledin the art to which it appertains to make and use the same, referencebeing had to the accompanying drawings, which forma part of thisspecification, and in which- Figure 1 is a perspective View of my devicefor elevating and dumping sawdust. Fig. 2 is a perspective view of thecarriage, the dotted lines showing the same as it appears when openedfor dumping or discharging its lead. Fig. 3 is a longitudinal sectionalview of the carriage. tion on line a: as in Fig. 3. Fig. 5 is a frontview of the carriage, and Fig. 6 is an enlarged detail view of thetripping mechanism for opening and automatically closing the bot tom ofthe carriage.

Like letters of reference denote corresponding parts in all the figures.

This invention relates to devices for elevating and dumping sawdust,coal, or coalscreenings, slag, ashes, or other refuse, carrying the samefrom the point where it accumulates to some convenient point located ata suitable distance where it is to be dumped, and is particularlydesigned for use in connection with saw-mills, both portable andstationary, for the purpose of collecting the sawdust as it accumulatesunder the saws, and carrying it away.

To this end my invention consists in the construction and combination ofparts of the improved collecting and dumping carriage, which will behereinafter described, and its combination with the devices whereby thesame is operated, substantially as hereinafter more fully set forth andclaimed.

In the accompanying two sheets of drawings, the letter A designates asaw-mill of any approved construction, and B the pit in which thesawdust is received from the saw or gang of saws. (Shown at C.) At asuitable dis tance from the mill where it is desired to Fig. 4 is atransverse vertical secdump the sawdust a pole or other structure D ofsuitable height is erected and suitably braced by guy-ropes E. The topof this pole is connected to the mill by a wire track-rope F, upon whichthe dumping-carriage (shown at G) travels. The track-rope is so arrangedthat the carriage on reaching the terminus of the track at the mill willpass down into the pit underneath the saw in such a position that itwill receive and collect the dust as it drops from the rapidly-revolvingsaws. The saw-arbor (shown at H) is provided with a friction-pulley I,adapted to engage another friction-pulley J, so arranged that by workinga suitably-located lever in the well-understood way the two pulleys Iand J may be brought into frictional contact with each other, while byletting go of this lever (shown at L) the two pulleys will becomeseparated and pulley J will remain at rest. The shaft of thefriction-pulleyJ is provided with a drum K, to which the hoisting-rope Mis fastened, and around which it is coiled in such a manner that whenthe pulley revolves the rope will be wound up upon the drum. The otherend of rope M passes over a block or sheave N, fastened to the upper endof the pole above the track-rope, and is then brought back and attachedto the front end or headboard of the carriage. Thus it will be seen thatwhen pulley J is revolved by operating the lever L, which throws it intofrictional contact with the continuously-revolving pulley I, thecarriage will be drawn out of the pit and up along the track-rope untilit reaches and strikes a stop 0, which is fastened (adjustably) upon thetrack-rope immediately above the point where it is desired to dump thecontents of the carriage. The carriage is of such a size and shape thatit will readily enter the pit beneath the saw, and is provided with abar or rod P, one end of which is fastened in the front end near its topand the other in the rear end. The rear end of this bar is bent to forman offset 19, forming a shoulder or abutment for the link q of thesheave Q. In the front end of the carriage is fastened the companionsheave Q, both sheaves traveling upon the track-rope and holding thecarriage suspended therefrom. The bottom of the carriage consists of twodoors or sections R R, which are hinged to the sides and opened bydropping downward. They are held in their closed position by means oftwo rods S S, (one for each section,) the upper ends of which arejointed to the inner end of a lever T, having its fulcrum at t in a slotin the front end or head-board of the carriage. The outwardly-projectingarm '1" of this lever has a laterally-projecting pin U, adapted toengage or interlock with a notch 41 in the trigger-arm V, which ispivoted at 10, while its upper free end has a laterally-projecting eye00, through which the free end of a spring X is inserted, the tension ofsaid spring being to force the free end of the trigger-arm in an outwarddirection, so as to engage (by its notch 11) the pin or lever T T. Onthe opposite side of arm V is a guiderod or keeper Y, between which andarm V the projecting outer arm of lever T T is confined.

From the foregoing description, taken in connection with the drawings,the operation of this device will readily be understood. The carriage,standing in the pit B, receives the sawdust as it drops from the mill,and when full the operator, by moving lever L, causes the filledcarriage to travel with its load up along the track-rope F. When thestop 0 is reached, the upper end of the trigger-arm V will strike thiswith sufficient force to overcome the tension of the retaining-spring X,thereby throwing the arm back and unlocking pin U from its notch 12,which releases lever T T and permits the two bottom sections R R toswing open and dump the load. When the operator lets go of lever L, thecarriage will descend the inclined plane formed by the track-rope by itsown gravity, and the moment arm V is withdrawn from the stop 0 itsspring X will again operate to interlock it with arm T T,therebyautomatically closing the doors or bottom and putting thecarriage in readiness to receive its next load. When the carriage, onits descent or return trip, reaches the pit, its sheave Q, when itstrikes the front beam 1) of the table above the pit, will be shovedover the offset 19 on the suspending-bar P and pushed up along this bar,so as to be out of the way as the rear end of the carriage runs backinto the dust-pit. When the carriage is again drawn out with its nextload, the movable sheave Q will of itself resume its proper position atthe rear end of bar P.

I-Iavin g thus described my invention, I claim and desire to secure byLetters Patent of the United States- 1. The combination of thecarriage-body,

longitudinal suspending-rod having an oifset near its rear end, thefixed front sheave, and the movable rear sheave adapted to slide alongthe suspending-rod, substantially as and for the purpose set forth.

2. The combination of the carriage-body, the hinged bottom sections, thelever fulcrumed in the head-board, links or rods con: necting said leverto the inner ends of the bottom sections, the trigger-arm adapted tointerlock with the outer end of the lever, and a spring bearing againstthe free end of the trigger-arm with sufficient force to close thecarriage-bottom automatically when pressure against the free end of thetrigger-arm is relaxed, substantially as and for the purpose set forth.

In testimony that I claim the foregoing as my own I have hereuntoaffixed my signature in presence of two witnesses.

WILLIAM FREY. Witnesses:

ROBERT WILLIGMANN, J OHN MowLs.

